docs: remove unnecessary steps

Author: xmlking

docs/platforms/node/pnpm.md

@@ -9,7 +9,7 @@
 brew install node
 # This will automatically install pnpm on your system.
 corepack enable pnpm
-# You can pin the version of pnpm used on your project using the following command:
+# (in your node project root) You can pin the version of pnpm used on your project using the following command:
 corepack use pnpm@latest-10
 ```
 
@@ -19,14 +19,6 @@ To upgrade in the future:
 corepack up
 ```
 
-Add following lines to [~/my/paths.zsh](../../../dotfiles/my/paths.zsh)
-
-```shell
-# pnpm
-export PNPM_HOME=$HOME/Library/pnpm
-export PATH=$PNPM_HOME:$PATH
-```
-
 ## Project Setup
 
 > [!NOTE]